视神经

例句：

1. 1. The doctor examined the patient's eye and found that there was a problem with the optic nerve.
   医生检查了患者的眼部，发现视神经有问题。
2. 2. After the surgery, the patient had to wait for the optic nerve to heal.
   手术后，患者必须等待视神经愈合。
3. 3. The patient's visual field was severely impaired due to the damage to the optic nerve.
   由于视神经受损，患者的视觉范围严重受限。